A moisture-proof and dehumidifying device for a power distribution cabinet in a power system

Abstract

The present invention relates to the field of protection of distribution cabinets, and particularly relates to a moisture-proof and dehumidifying device for a distribution cabinet in a power system, which includes a base and a distribution cabinet body with heat dissipation holes installed on the base. A humidity sensor is installed inside the distribution cabinet body, and a dehumidifying mechanism for removing moisture is provided on the distribution cabinet body. A leak-proof mechanism for opening and closing the heat dissipation holes is provided on the distribution cabinet body, and the leak-proof mechanism is connected to the dehumidifying mechanism. By adding a humidity sensor, a dehumidifying mechanism, a leak-proof mechanism, etc., when the humidity sensor reaches the set value, it transmits a signal to the dehumidifying mechanism, playing a good role in moisture-proof and dehumidifying. Moreover, during dehumidification, the leak-proof mechanism will block the heat dissipation holes of the distribution cabinet body to prevent external air from being sucked into the distribution cabinet body and increasing the degree of humidity, further improving the dehumidification effect, replacing the traditional method of using desiccants for moisture-proof and dehumidifying, eliminating the need for frequent replacement of desiccants and simplifying the operation.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution cabinet protection, and particularly relates to a moisture-proof and dehumidifying device for a power distribution cabinet used in a power system. Background Art

[0002] A power distribution cabinet is the end device of a power distribution system and is a general term for a motor control center. When the power distribution cabinet is in use, it often encounters the situation of excessive humidity inside. When the internal environment of the power distribution cabinet is in a humid state, it will cause damage to the electrical components inside the power distribution cabinet. In order for the power distribution cabinet to work properly, moisture-proof and dehumidifying treatment needs to be carried out on the power distribution cabinet.

[0003] Currently, a method of combining improving air circulation and desiccants is mostly adopted to remove the moisture inside the power distribution cabinet. For example, the patent with the publication number CN217405967U uses this method for dehumidification. However, after the desiccant is used for a period of time, it will be in a saturated state, and it needs to be regularly replaced by the staff, which is rather cumbersome to operate, and the dehumidification effect is also average. For this reason, we have proposed a moisture-proof and dehumidifying device for a power distribution cabinet used in a power system. Summary of the Invention

[0004] (1) In view of the deficiencies of the prior art, the present invention provides a moisture-proof and dehumidifying device for a power distribution cabinet used in a power system, which overcomes the general problem of dehumidifying the power distribution cabinet in the prior art, simplifies the operation, and improves the dehumidification effect.

[0005] (2) To achieve the above objectives, the present invention is realized through the following technical solutions: A moisture-proof and dehumidifying device for a power distribution cabinet used in a power system includes a base and a power distribution cabinet body with heat dissipation holes installed on the base. A humidity sensor is installed inside the power distribution cabinet body, and a dehumidifying mechanism for removing moisture is provided on the power distribution cabinet body. A leak-proof mechanism for opening and closing the heat dissipation holes is provided on the power distribution cabinet body, and the leak-proof mechanism is connected to the dehumidifying mechanism;

[0006] The dehumidifying mechanism includes a dehumidifying box fixed to the power distribution cabinet body. A partition is fixed inside the dehumidifying box, and a semiconductor refrigeration sheet is installed through the partition. An air suction pipe is connected between the top of the dehumidifying box and the top of the power distribution cabinet body, and an air outlet pipe is connected to the bottom of the dehumidifying box. An air pump is installed on the air outlet pipe, and the other end of the air outlet pipe is connected to a cylinder body. A return air pipe is connected between the cylinder body and the lower part of the power distribution cabinet body. A water receiving part for collecting condensed water is provided below the cold end of the semiconductor refrigeration sheet, and a heat dissipation part is provided at the position corresponding to the hot end of the semiconductor refrigeration sheet in the dehumidifying box.

[0007] Preferably, the water receiving part includes a water receiving box fixed to the lower part of the partition corresponding to the cold end of the semiconductor refrigeration sheet. A flowing water pipe is connected to the bottom of the water receiving box, and the other end of the flowing water pipe extends out of the dehumidifying box and is connected to a water storage tank.

[0008] Preferably, the heat dissipation part includes air holes opened at the position of the hot end of the semiconductor refrigeration sheet corresponding to the dehumidification box, and a fan is installed on the dehumidification box.

[0009] Preferably, the leak prevention mechanism includes a piston plate arranged inside the cylinder body. A push rod is fixed on the piston plate and is slidably installed with the cylinder body. The other end of the push rod is fixed with a connecting rod, and sealing plates slidably installed with the power distribution cabinet body are fixed at both ends of the connecting rod. Strip-shaped holes are opened at the positions of the sealing plates corresponding to the heat dissipation holes. A first spring is sleeved on the push rod, and the first spring is fixed between the cylinder body and the piston plate.

[0010] Preferably, a support frame is fixed on the base. A protective cover for protecting the power distribution cabinet body is arranged on the support frame. An unlocking mechanism is arranged on the protective cover. A buffer mechanism for reducing the impact of the protective cover is arranged on the base. A smoke sensor is also installed inside the power distribution cabinet body.

[0011] Preferably, the protective cover includes an upper cover body fixed to the support frame. A middle cover body is slidably installed on the upper cover body, and a lower cover body is slidably installed on the middle cover body.

[0012] Preferably, the unlocking mechanism includes an electric push rod installed on the support frame. A moving block is fixed at the movable end of the electric push rod. Connecting rods are symmetrically and rotatably installed on the moving block. The other ends of the connecting rods are rotatably installed with hanging rods. A support block slidably installed with the hanging rods is fixed on the support frame. Hanging plates are symmetrically fixed on the lower cover body, and hanging holes for clamping the hanging rods are opened on the hanging plates.

[0013] Preferably, the buffer mechanism includes grooves symmetrically opened on the base. A plurality of dampers are installed in the grooves. A buffer plate is fixed on the dampers, and a second spring is sleeved on the dampers. The second spring is fixed between the buffer plate and the bottom of the groove.

[0014] Preferably, a fire extinguishing and purification mechanism is arranged on the upper cover body. The fire extinguishing and purification mechanism includes a purification tank penetrating and installed on the upper cover body. A dry powder tank is installed inside the upper cover body. The bottom of the dry powder tank is communicated with a spray pipe. The other end of the spray pipe extends into the power distribution cabinet body, and a solenoid valve is installed on the spray pipe.

[0015] Preferably, activated carbon particles are filled in the purification tank.

[0016] (III) The present invention provides a moisture-proof and dehumidifying device for a power distribution cabinet in a power system, having the following beneficial effects:

[0017] 1. By adding a humidity sensor, a dehumidification mechanism, a leak prevention mechanism, etc., when the humidity sensor reaches the set value, it transmits a signal to the dehumidification mechanism, playing a good role in moisture-proof and dehumidification. Moreover, during dehumidification, the leak prevention mechanism will block the heat dissipation holes of the distribution cabinet body to prevent external air from being sucked into the distribution cabinet body and increasing the humidity, further improving the dehumidification effect. It replaces the traditional method of using desiccants for moisture-proof and dehumidification, eliminating the need for frequent replacement of desiccants and simplifying the operation.

[0018] 2. By adding a protective cover and a release mechanism, the smoke sensor transmits a signal to the electric push rod. The electric push rod starts and drives the hanging rods on both sides to be pulled out from the corresponding hanging holes. At this time, the lower cover body is released from the restriction and can be pulled out and moved down to complete the enclosure of the distribution cabinet body, effectively preventing the spread of fire and causing harm.

[0019] 3. By adding a buffer mechanism, during the rapid downward movement of the lower cover body, the lower cover body first contacts the buffer plate. Through the buffering and shock absorption of the damper and spring two, it can prevent the lower cover body from colliding with the base and being deformed and damaged.

[0020] 4. By adding a fire extinguishing and purification mechanism, the smoke sensor transmits a signal to the solenoid valve. The solenoid valve opens, and the dry powder in the dry powder tank is quickly ejected from the spray pipe to extinguish the fire in the distribution cabinet body. At the same time, the generated smoke enters the purification tank and is adsorbed and purified by activated carbon before being discharged, reducing environmental pollution.

[0021] In summary, the present invention replaces the traditional method of using desiccants for moisture-proof and dehumidification, simplifies the operation, improves the dehumidification effect, and provides good protection for the distribution cabinet body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the moisture-proof and dehumidification equipment of the present invention;

[0023] Figure 2 is a schematic structural diagram of the moisture-proof and dehumidification equipment of the present invention from another perspective;

[0024] Figure 3 is a cross-sectional view of the structure of the dehumidification mechanism of the present invention;

[0025] Figure 4 is a cross-sectional view of the structure of the leak prevention mechanism of the present invention;

[0026] Figure 5 is the present invention Figure 4 enlarged schematic view of part A;

[0027] Figure 6 is a side cross-sectional view of the structure of the distribution cabinet body of the present invention;

[0028] Figure 7 is a schematic structural diagram of the moisture-proof and dehumidification equipment of the second embodiment of the present invention;

[0029] Figure 8 Schematic diagram of the protective cover and the hanging mechanism in Embodiment 2 of the present invention;

[0030] Figure 9 Schematic diagram of the buffer mechanism in Embodiment 2 of the present invention;

[0031] Figure 10 Schematic diagram of the damper and spring two in Embodiment 2 of the present invention;

[0032] Figure 11 Schematic diagram of the moisture-proof and dehumidifying device in Embodiment 3 of the present invention;

[0033] Figure 12 Cross-sectional view of the moisture-proof and dehumidifying device in Embodiment 3 of the present invention.

[0034] In the figure: 1, base; 2, power distribution cabinet body; 3, dehumidifying mechanism; 31, dehumidifying box; 32, partition board; 33, semiconductor refrigeration sheet; 34, suction pipe; 35, air outlet pipe; 36, air pump; 37, water receiving part; 371, water receiving box; 372, flowing water pipe; 373, water storage tank; 38, heat dissipation part; 381, fan; 382, air hole; 39, cylinder body; 310, return air pipe; 4, leak-proof mechanism; 41, piston plate; 42, push rod; 43, spring one; 44, connecting rod; 45, sealing plate; 46, strip hole; 5, support frame; 6, protective cover; 61, upper cover body; 62, middle cover body; 63, lower cover body; 7, release mechanism; 71, electric push rod; 72, moving block; 73, connecting rod; 74, hanging rod; 75, support block; 76, hanging plate; 77, hanging hole; 8, buffer mechanism; 81, groove; 82, buffer plate; 83, damper; 84, spring two; 9, fire extinguishing and purification mechanism; 91, purification tank; 92, dry powder tank; 93, spray pipe; 94, solenoid valve; 10, humidity sensor; 11, smoke sensor. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] Example 1

[0038] As Figures 1 - 6 shown, a moisture-proof and dehumidifying device for a power distribution cabinet in a power system includes a base 1 and a power distribution cabinet body 2 with heat dissipation holes installed on the base 1. A humidity sensor 10 is installed inside the power distribution cabinet body 2, and a dehumidifying mechanism 3 for removing moisture is provided on the power distribution cabinet body 2. A leak-proof mechanism 4 for opening and closing the heat dissipation holes is provided on the power distribution cabinet body 2, and the leak-proof mechanism 4 is connected to the dehumidifying mechanism 3. Among them, when the humidity sensor 10 reaches the set value, it transmits a signal to the dehumidifying mechanism 3. At this time, the dehumidifying mechanism 3 starts to dry the moisture inside the power distribution cabinet body 2 by gas circulation to ensure the removal of moisture inside the power distribution cabinet body 2, playing a good role in moisture-proof and dehumidifying. At the same time, during the operation of the dehumidifying mechanism 3, the leak-proof mechanism 4 will block the heat dissipation holes of the power distribution cabinet body 2 to prevent external air from being sucked into the power distribution cabinet body 2 and increasing the degree of humidity, further improving the dehumidifying effect.

[0039] The dehumidifying mechanism 3 includes a dehumidifying box 31 fixed on the power distribution cabinet body 2. A partition 32 is fixed inside the dehumidifying box 31. A semiconductor refrigeration sheet 33 is installed through the partition 32. A suction pipe 34 is connected between the top of the dehumidifying box 31 and the top of the power distribution cabinet body 2, and an air outlet pipe 35 is connected to the bottom of the dehumidifying box 31. An air pump 36 is installed on the air outlet pipe 35, and the other end of the air outlet pipe 35 is connected to a cylinder body 39. A return air pipe 310 is connected between the cylinder body 39 and the lower part of the power distribution cabinet body 2. A water receiving part 37 for collecting condensed water is provided below the cold end of the semiconductor refrigeration sheet 33, and a heat dissipation part 38 is provided at the position corresponding to the hot end of the semiconductor refrigeration sheet 33 in the dehumidifying box 31. Among them, the signal of the humidity sensor 10 is transmitted to the semiconductor refrigeration sheet 33, the fan 381 and the air pump 36. The semiconductor refrigeration sheet 33, the fan 381 and the air pump 36 are started. The semiconductor refrigeration sheet 33 starts to refrigerate. The air pump 36 extracts the moisture inside the power distribution cabinet body 2. When the moisture passes through the cold end of the semiconductor refrigeration sheet 33, condensed water forms on the cold end of the semiconductor refrigeration sheet 33 for the humid air. The dewatered gas enters the cylinder body 39 from the air outlet pipe 35, and then the gas re-enters the power distribution cabinet body 2 from the return air pipe 310 again. By repeating this cycle, the moisture inside the power distribution cabinet body 2 can be removed. After the humidity is reduced to the set value, the signal is transmitted to the semiconductor refrigeration sheet 33, the fan 381 and the air pump 36, and the semiconductor refrigeration sheet 33, the fan 38 and the air pump 36 will shut down, replacing the traditional method of using desiccants for moisture-proof and dehumidifying, eliminating the need to frequently replace desiccants, simplifying the operation, and having a good moisture-proof and dehumidifying effect. During this period, the condensed water will enter the water receiving part 37 and be discharged.

[0040] Specifically, the leakage prevention mechanism 4 includes a piston plate 41 arranged in the cylinder 39, and a push-pull rod 42 is fixed on the piston plate 41 and is slidably mounted with the cylinder 39. A connecting rod 44 is fixed to the other end of the push-pull rod 42, and both ends of the connecting rod 44 are fixed with a sealing plate 45 that is slidably mounted with the distribution cabinet 2. The sealing plate 45 has a strip hole 46 at the position corresponding to the heat dissipation hole, and a spring 43 is sleeved on the push-pull rod 42, and the spring 43 is fixed between the cylinder 39 and the piston plate 41. Among them, during the dehumidification cycle of the gas, the air pressure will push the piston plate 41 to move toward the distribution cabinet 2, and then the gas can flow normally from the return air pipe 310 to the distribution cabinet 2 to realize the circulation and dehumidification of the gas; the movement of the piston plate 41 will drive the push-pull rod 42 and the connecting rod 44 to move toward the distribution cabinet 2, and then drive the sealing plates 45 on both sides to move, so that the strip holes 46 of the sealing plates 45 are misaligned with the heat dissipation holes. At this time, the other positions of the sealing plates 45 cover the heat dissipation holes, thereby blocking the heat dissipation holes, preventing the outside air from being sucked into the distribution cabinet 2 by the air pump 36 and increasing the degree of humidity, thereby further improving the dehumidification effect.

[0041] In summary, when the humidity sensor 10 reaches the set value, it transmits a signal to the dehumidification mechanism 3, and the humid gas is dehumidified and dried during the circulation process, which plays a better moisture-proof and dehumidification role; moreover, during the gas circulation process, the anti-leakage mechanism 4 will seal the heat dissipation holes of the distribution cabinet 2 to prevent outside air from being sucked into the distribution cabinet 2 and increasing the degree of humidity, further improving the dehumidification effect.

[0042] In this embodiment, the water receiving portion 37 includes a water receiving box 371 fixed to the lower portion of the partition 32 corresponding to the cold end of the semiconductor cooling plate 33. A water pipe 372 is connected to the bottom of the water receiving box 371. The other end of the water pipe 372 extends out of the dehumidification box 31 and is connected to the water storage tank 373. Condensed water flows into the water receiving box 371, then flows through the water pipe 372 to the water storage tank 373, where it is stored, allowing the condensed water to be smoothly discharged from the dehumidification box 31.

[0043] In this embodiment, the heat dissipation unit 38 includes air holes 382 formed in the dehumidification box 31 at positions corresponding to the hot ends of the semiconductor cooling fins 33. A fan 381 is mounted on the dehumidification box 31. During the cooling process of the semiconductor cooling fins 33, the fan 381 promptly dissipates heat generated at the hot ends of the semiconductor cooling fins 33, thereby enabling better cooling at the cold ends of the semiconductor cooling fins 33.

[0044] Example 2

[0045] refer to Figures 6 - 10, which is basically the same as Embodiment 1. More optimally, a support frame 5 is fixed on the base 1, and a protective cover 6 for protecting the power distribution cabinet body 2 is provided on the support frame 5. Specifically, the protective cover 6 includes an upper cover body 61 fixed to the support frame 5, a middle cover body 62 is slidably installed on the upper cover body 61, and a lower cover body 63 is slidably installed on the middle cover body 62. An unlocking mechanism 7 is provided on the protective cover 6, a buffering mechanism 8 for reducing the impact of the protective cover 6 is provided on the base 1, and a smoke sensor 11 is also installed in the power distribution cabinet body 2. Among them, when a fire breaks out in the power distribution cabinet body 2, the smoke sensor 11 transmits a signal to the unlocking mechanism 7, the unlocking mechanism 7 releases the restriction, the middle cover body 62 and the lower cover body 63 start to be withdrawn until the bottom end of the lower cover body 63 abuts against the top end of the base 1, completing the enclosure of the power distribution cabinet body 2, which can effectively prevent the spread of fire and cause harm.

[0046] In this embodiment, the unlocking mechanism 7 includes an electric push rod 71 installed on the support frame 5. A moving block 72 is fixed to the movable end of the electric push rod 71. Connecting rods 73 are symmetrically and rotatably installed on the moving block 72. The other ends of the connecting rods 73 are rotatably installed with hanging rods 74. A support block 75 for slidably installing the hanging rods 74 is fixed on the support frame 5. Hanging plates 76 are symmetrically fixed on the lower cover body 63, and hanging holes 77 for engaging with the hanging rods 74 are formed in the hanging plates 76. Among them, the smoke sensor 11 transmits a signal to the electric push rod 71, the electric push rod 71 starts, and drives the moving block 72 to move backward (in Figure 7 reference to the orientation), through the transmission of the two-sided connecting rods 73, the two-sided hanging rods 74 are driven to be withdrawn from the corresponding hanging holes 77. At this time, the lower cover body 63 is released from the restriction and can be withdrawn and moved downward.

[0047] In this embodiment, the buffering mechanism 8 includes grooves 81 symmetrically formed on the base 1. A plurality of dampers 83 are installed in the grooves 81. A buffer plate 82 is fixed to the dampers 83, and a second spring 84 is sleeved on the dampers 83. The second spring 84 is fixed between the buffer plate 82 and the bottom of the groove 81. Among them, during the rapid downward movement of the lower cover body 63, the lower cover body 63 first abuts against the buffer plate 82. Through the buffering and shock absorption of the dampers 83 and the second spring 84, it is possible to prevent the lower cover body 63 from colliding with the base 1 and being deformed and damaged.

[0048] Embodiment 3

[0049] Reference Figures 11 - 12, which is basically the same as Embodiment 2. More optimally, a fire extinguishing and purification mechanism 9 is provided on the upper cover body 61. The fire extinguishing and purification mechanism 9 includes a purification tank 91 penetrating and installed on the upper cover body 61. Specifically, activated carbon particles are filled in the purification tank 91. A dry powder tank 92 is installed in the upper cover body 61. A spray pipe 93 is connected to the bottom of the dry powder tank 92. The other end of the spray pipe 93 extends into the power distribution cabinet body 2, and a solenoid valve 94 is installed on the spray pipe 93. Among them, the smoke sensor 11 also transmits a signal to the solenoid valve 94. The solenoid valve 94 is opened, and the dry powder in the dry powder tank 92 is quickly ejected from the spray pipe 93 to extinguish the fire in the power distribution cabinet body 2. At the same time, the generated flue gas enters the purification tank 91 and is adsorbed and purified by the activated carbon and then discharged, reducing environmental pollution.

[0050] The moisture-proof and dehumidifying device of the present invention replaces the traditional use of desiccants for moisture-proof and dehumidification, simplifies the operation, improves the dehumidification effect, and also provides good protection for the power distribution cabinet body.

[0051] All kinds of components used in this application document are standard parts and can be purchased from the market. The specific connection methods of each part all adopt conventional means such as bolts, rivets and welding that are mature in the prior art. The machinery, parts and electrical equipment all adopt conventional models in the prior art.

[0052] The disclosed embodiments of the present invention are preferred embodiments, but not limited thereto. Those of ordinary skill in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not depart from the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A moisture-proof and dehumidifying device for a power distribution cabinet in an electric power system, comprising a base (1) and a power distribution cabinet body (2) with heat dissipation holes mounted on the base (1), characterized in that: A humidity sensor (10) is installed in the power distribution cabinet (2), and a dehumidification mechanism (3) for removing moisture is provided on the power distribution cabinet (2). A leak prevention mechanism (4) for opening and closing heat dissipation holes is provided on the power distribution cabinet (2), and the leak prevention mechanism (4) and the dehumidification mechanism (3) are connected; The dehumidification mechanism (3) includes a dehumidification box (31) fixed on the power distribution cabinet (2), a partition (32) is fixed in the dehumidification box (31), a semiconductor refrigeration plate (33) is installed on the partition (32), an air intake pipe (34) is connected between the top of the dehumidification box (31) and the top of the power distribution cabinet (2), and an air outlet pipe (35) is connected to the bottom of the dehumidification box (31), an air pump (36) is installed on the air outlet pipe (35), and the other end of the air outlet pipe (35) is connected to a cylinder (39), and a return air pipe (310) is connected between the cylinder (39) and the lower part of the power distribution cabinet (2), a water receiving portion (37) for collecting condensed water is provided at the lower part of the cold end of the semiconductor refrigeration plate (33), and a heat dissipation portion (38) is provided at the hot end position of the dehumidification box (31) corresponding to the semiconductor refrigeration plate (33); The anti-leakage mechanism (4) includes a piston plate (41) arranged in the cylinder (39), a push-pull rod (42) slidably mounted with the cylinder (39) is fixed on the piston plate (41), a connecting rod (44) is fixed to the other end of the push-pull rod (42), and a sealing plate (45) slidably mounted with the power distribution cabinet (2) is fixed at both ends of the connecting rod (44), and a strip hole (46) is opened on the sealing plate (45) at a position corresponding to the heat dissipation hole, and a spring (43) is sleeved on the push-pull rod (42), and the spring (43) is fixed between the cylinder (39) and the piston plate (41).

2. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 1, characterized in that: The water receiving portion (37) includes a water receiving box (371) fixed to the lower portion of the cold end of the semiconductor refrigeration plate (33) corresponding to the partition (32), and the bottom of the water receiving box (371) is connected to a water flow pipe (372), and the other end of the water flow pipe (372) extends out of the dehumidification box (31) and is connected to a water storage tank (373).

3. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 1, characterized in that: The heat dissipation portion (38) includes an air hole (382) opened at a hot end position of the dehumidification box (31) corresponding to the semiconductor refrigeration plate (33), and a fan (381) is installed on the dehumidification box (31).

4. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 1, characterized in that: A support frame (5) is fixed on the base (1), a protective cover (6) for protecting the power distribution cabinet (2) is provided on the support frame (5), a release mechanism (7) is provided on the protective cover (6), a buffer mechanism (8) for reducing the impact of the protective cover (6) is provided on the base (1), and a smoke sensor (11) is also installed in the power distribution cabinet (2).

5. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 4, characterized in that: The protective cover (6) comprises an upper cover body (61) fixed to the support frame (5), a middle cover body (62) is slidably mounted on the upper cover body (61), and a lower cover body (63) is slidably mounted on the middle cover body (62).

6. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 5, characterized in that: The release mechanism (7) comprises an electric push rod (71) mounted on the support frame (5), a movable block (72) is fixed to the movable end of the electric push rod (71), a connecting rod (73) is symmetrically rotatably mounted on the moving block (72), a hooking rod (74) is rotatably mounted on the other end of the connecting rod (73), a support block (75) is fixed on the support frame (5) and is slidably mounted on the hooking rod (74), a hooking plate (76) is symmetrically fixed on the lower cover (63), and a hooking hole (77) is provided on the hooking plate (76) and is engaged with the hooking rod (74).

7. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 5, characterized in that: The buffer mechanism (8) comprises a groove (81) symmetrically opened on the base (1), a plurality of dampers (83) are installed in the groove (81), a buffer plate (82) is fixed on the damper (83), and a second spring (84) is sleeved on the damper (83), and the second spring (84) is fixed between the buffer plate (82) and the bottom of the groove (81).

8. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 5, characterized in that: The upper cover (61) is provided with a fire extinguishing and purification mechanism (9), which includes a purification tank (91) installed through the upper cover (61), a dry powder tank (92) installed in the upper cover (61), and a nozzle (93) connected to the bottom of the dry powder tank (92). The other end of the nozzle (93) extends into the distribution cabinet (2), and a solenoid valve (94) is installed on the nozzle (93).

9. The moisture-proof and dehumidifying device for a power distribution cabinet in a power system according to claim 8, characterized in that: The purification tank (91) is filled with activated carbon particles.

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